# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

# 支持gnu++11
# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")

# 1. 定义so库和头文件所在目录，方面后面使用
set(ffmpeg_lib_dir ${CMAKE_CURRENT_SOURCE_DIR}/libs/${ANDROID_ABI})

set(ffmpeg_head_dir ${CMAKE_SOURCE_DIR})

# 2. 添加头文件目录
include_directories(include)

# 3. 添加ffmpeg相关的so库
add_library(avcodec
        SHARED
        IMPORTED )
set_target_properties(avcodec
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libavcodec.so )

add_library(avfilter
        SHARED
        IMPORTED )
set_target_properties(avfilter
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libavfilter.so )

add_library(avformat
        SHARED
        IMPORTED )
set_target_properties(avformat
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libavformat.so )

add_library(avutil
        SHARED
        IMPORTED )
set_target_properties(avutil
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libavutil.so )

add_library(fdk-aac
        SHARED
        IMPORTED )
set_target_properties(fdk-aac
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libfdk-aac.so )

add_library(swresample
        SHARED
        IMPORTED )
set_target_properties(swresample
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libswresample.so )

add_library(swscale
        SHARED
        IMPORTED )
set_target_properties(swscale
        PROPERTIES
        IMPORTED_LINK_INTERFACE_LIBRARIES ""
        IMPORTED_LOCATION ${ffmpeg_lib_dir}/libswscale.so )

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             native-lib.cpp
        Decoder.cpp
        )

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib

                       avcodec
                       avfilter
                       avformat
                       avutil
                       fdk-aac
                       swresample
                       swscale

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )